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Resin composition for making vibrating diaphragm of loudspeaker

A technology of resin composition and vibrating sheet, applied in the direction of sound-producing equipment, instruments, etc., can solve the problems of environmental pollution, residue, poisoning of on-site operators, etc.

Inactive Publication Date: 2007-12-19
产协企业股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is known that the aforementioned aldehydes or aldehyde compounds are usually toxic, which will not only cause poisoning to field operators, but also cause environmental pollution
More importantly, the speaker vibrating piece made of phenolic resin often has the problem of residual aldehyde compounds (such as formaldehyde), and the residual aldehyde compounds are very easy to cause poison to users and cause further environmental pollution question
[0004] In order to solve the problem of poisoning caused by the possible residual formaldehyde in the speaker vibrating piece made of phenolic resin in the past, it is extremely important to actively search for a phenolic resin substitute that can make the finished product of the horn vibrating piece non-toxic. Important matter

Method used

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  • Resin composition for making vibrating diaphragm of loudspeaker
  • Resin composition for making vibrating diaphragm of loudspeaker
  • Resin composition for making vibrating diaphragm of loudspeaker

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0039] Add 137.8 parts by weight of water in the reaction vessel, then add 80 parts by weight of methyl methacrylate, 6.2 parts by weight of methyl acrylate, 1 part by weight of acrylic acid and 0.1 part by weight of divinylbenzene in other containers After mixing, a reactive anionic emulsifier / anionic emulsifier (1.5 parts by weight / 0.5 parts by weight, calculated as monomers) was added, thereby obtaining a pre-emulsion of polymer monomers.

[0040] Feed nitrogen into the aforementioned reaction vessel, and raise the internal temperature of the reaction vessel to 75°C, add 0.05 parts by weight of ammonium persulfate used as a polymerization initiator, and slowly decompose the pre-emulsion of the aforementioned polymer monomer through 3 hours Addition; while adding the polymer monomer pre-emulsion, add another 1% ammonium persulfate aqueous solution, and complete the addition within 3.5 hours. After the initiator has been dropped, it is kept at 80°C for 2 hours, then cooled to...

Synthetic example 2

[0042] Same as Synthesis Example 1, only wherein the emulsifier is replaced by reactive anionic emulsifier / anionic emulsifier (calculated as monomer) of 1 weight part / 0.5 weight part, the polymer emulsion thus obtained is referred to as "Em -2".

Synthetic example 3

[0044] Same as Synthesis Example 1, only wherein the emulsifier is replaced by reactive anionic emulsifier / anionic emulsifier (calculated as monomer) of 1 weight part / 1 weight part, the polymer emulsion thus obtained is referred to as "Em -3".

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Abstract

The resin composition for making vibrating diaphragm of loudspeaker consists of compound A of alkyl acrylate, unsaturated monomer B with vinyl group, and emulsifier C. Of the resin composition, the compound A accounts for 50-99.9 wt% of A+B, the unsaturated monomer B accounts for 0.1-50 wt% of A+B, and the emulsifier C is preferably in 0.1-10 wt% of A+B.

Description

technical field [0001] The invention relates to a resin composition for making horn vibrating pieces, in particular to a resin composition of non-toxic formaldehyde compounds, which is used to reduce the possible toxic hazards in the production process of known horn vibrating pieces. Background technique [0002] The so-called speaker vibrating sheet, also known as speaker drum paper or elastic wave, refers to the paper surface attached to the outer edge of the speaker (speaker). Known horn vibrating piece is by base material (such as, paper or cloth etc.) is dipped in molding resin or this resin is coated on its surface, after drying to remove solvent, then through thermocompression molding, thus made has Elastic horn vibrating piece. [0003] At present, the industry often uses phenolic resin composed of phenolic compound and aldehyde compound as the aforementioned molding resin to manufacture the horn vibrating piece. However, it is known that the aforementioned aldehyd...

Claims

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Application Information

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IPC IPC(8): C08F20/00C08F2/22C08F2/44G10K13/00
Inventor 徐文祥大原博
Owner 产协企业股份有限公司